The Currituck Slide, mid-Atlantic continental slope — Revisited

Prior, David B.; Doyle, E.H.; Neurauter, Tom

doi:10.1016/0025-3227(86)90109-x

Cited by 48 publications

(41 citation statements)

References 8 publications

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“…The first tsunami simulations are computed for three landslide geometries discussed by Locat et al (2009-this issue): Slide 1 (downslope sub-event, volume = 108 km 3 ), Slide 2 (upslope subevent, volume = 57 km 3 ), and a composite of Slides 1 and 2 (volume = 128-165 km 3 ) (cf., Prior et al, 1986). Previously, it has been unclear whether Slides 1 and 2 occurred as separate tsunamigenerating events (relative to the phase speed of tsunami waves), although Locat et al (2009-this issue) suggest that the two sub-events occurred simultaneously during failure (i.e., the composite slide).…”

Section: Currituck Landslide Scenariosmentioning

confidence: 99%

“…The headwall of the landslide is located approximately 100 km offshore North Carolina and Virginia, just down slope from the continental shelf edge. The morphology, stability, and dynamics of the slide have been studied by Prior et al (1986) and by studies presented in this volume (Locat et al, 2009-this issue;Twichell et al, 2009-this issue). The Currituck landslide complex is thought to be composed of at least two separate events, although the mobility analysis presented by Locat et al (2009-this issue) suggest that these events occurred contemporaneously.…”

Section: Introductionmentioning

confidence: 99%

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Hydrodynamic modeling of tsunamis from the Currituck landslide

2009

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Keywords: tsunami landslide hydrodynamic runup numerical model sensitivity analysis Tsunami generation from the Currituck landslide offshore North Carolina and propagation of waves toward the U.S. coastline are modeled based on recent geotechnical analysis of slide movement. A long and intermediate wave modeling package (COULWAVE) based on the non-linear Boussinesq equations are used to simulate the tsunami. This model includes procedures to incorporate bottom friction, wave breaking, and overland flow during runup. Potential tsunamis generated from the Currituck landslide are analyzed using four approaches: (1) tsunami wave history is calculated from several different scenarios indicated by geotechnical stability and mobility analyses; (2) a sensitivity analysis is conducted to determine the effects of both landslide failure duration during generation and bottom friction along the continental shelf during propagation; (3) wave history is calculated over a regional area to determine the propagation of energy oblique to the slide axis; and (4) a high-resolution 1D model is developed to accurately model wave breaking and the combined influence of nonlinearity and dispersion during nearshore propagation and runup. The primary source parameter that affects tsunami severity for this case study is landslide volume, with failure duration having a secondary influence. Bottom friction during propagation across the continental shelf has a strong influence on the attenuation of the tsunami during propagation. The high-resolution 1D model also indicates that the tsunami undergoes nonlinear fission prior to wave breaking, generating independent, short-period waves. Wave breaking occurs approximately 40-50 km offshore where a tsunami bore is formed that persists during runup. These analyses illustrate the complex nature of landslide tsunamis, necessitating the use of detailed landslide stability/mobility models and higher-order hydrodynamic models to determine their hazard.Published by Elsevier B.V.

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Section: Currituck Landslide Scenariosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrodynamic modeling of tsunamis from the Currituck landslide

2009

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“…The Canadian abyssal plain turbidites (Grantz et al, 1996), Afen 674 slide (Wilson et al, 2004), Rockall bank slump (Flood et al, 1979) and north 675 tent 14 C dates. Landslide ages inferred from sediment thickness and nearby 677 sedimentation rates, such as for the Andøya slide (Laberg et al, 2000), Peach 678 2 and 3 debris flows (Holmes et al, 1998), Currituck slide (Prior et al, 1986) 679 and Amazon shallow E debris flow (Maslin et al, 2005), were omitted as well.…”

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confidence: 99%

Timing and frequency of large submarine landslides: implications for understanding triggers and future geohazard

Urlaub¹,

Talling²,

Masson³

2013

Quaternary Science Reviews

172

164

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Large submarine landslides can have serious socioeconomic consequences as they have the potential to cause tsunamis and damage seabed infrastructure. It is important to understand the frequency of these landslides, and how that frequency is related to climate-driven factors such as sea level or sedimentation rate, in order to assess their occurrence in the future. Recent studies have proposed that more landslides occur during periods of sea level rise and lowstand, or during periods of rapid sedimentation. In this contribution we test these hypotheses by analysing the most comprehensive global data set of ages for large (> 1km 3 ) late Quaternary submarine landslides that has been compiled to date. We include the uncertainties in each landslide age that arise from both the dating technique, and the typically larger uncertainties that result from the position of the samples used for dating. Contrary to the hypothesis that continental slope stability is linked to sea level change, the data set does not show statistically significant patterns, trends or clusters in landslide abundance. If such a link between sea level and landslide frequency exists it is too weak to be detected using the available global data base. It is possible that controlling factors vary between different geographical areas, and their role is therefore hidden * Corresponding author Email address: m.urlaub@noc.soton.ac.uk (Morelia Urlaub)Preprint submitted to Elsevier March 1, 2013in a global data set, or that the uncertainties within the dates is too great to see an underlying correlation. Our analysis also shows that there is no evidence for an immediate influence of rapid sedimentation on slope stability as failures tend to occur several thousand years after periods of increased sedimentation rates. The results imply that there is not a strong global correlation of landslide frequency with sea level changes or increases in local sedimentation rate, based on the currently available ages for large submarine landslides.

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“…The observed failure is a rather typical translational slide of bedded sediments with about 4 Km 3 of downslope moved sediments along a distance of 6 to 7 Km over a well defined glide plane. The overall morphological characteristics of the slide resemble to that of Currituc translational slide in the Mid-Atlantic continental slope (Prior et al, 1986) despite the volume differences. The overall structure and characteristics (scarps, block slidesolistoliths, slide debris, weak layers as glide planes) indicates a failure mechanism similar to that described in the review paper on the origin and behavor of submarine slub slides (O'Leary, 1991).…”

Section: Slide Geometry (Morphology)mentioning

confidence: 70%

Stratigraphy and dating of a large slumping event in the Northern Aegean

Lykousis¹,

Rousakis²,

Pavlakis³

et al. 2018

geosociety

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Continuous seismic (Air-Gun) subbotom profiling in the N.Aegean was revealed a large submarine translational slide. The failure zone is extended from about 300m depth down to 800 m and covers an area of 85 Km2. The mean thickness of the slide reaches about 55 m and an estimated total volume of 4 Km3 of Quaternary sediments have been slided along a distance of 6 to 7 Km. Chronostratigraphic analysis of the acoustic reflectors imply that the slide plane is the muddy layer of late Pleistocene age (170-240 Ka BP). AMS dating of sediment cores provided indications that this major slide event occurred 5 to 6 Ka BP.

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The Currituck Slide, mid-Atlantic continental slope — Revisited

Cited by 48 publications

References 8 publications

Hydrodynamic modeling of tsunamis from the Currituck landslide

Hydrodynamic modeling of tsunamis from the Currituck landslide

Timing and frequency of large submarine landslides: implications for understanding triggers and future geohazard

Stratigraphy and dating of a large slumping event in the Northern Aegean

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